{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-41956/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-41956"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":[],"_cs_severities":["medium"],"_cs_tags":["cve-2026-41956","denial-of-service","f5","tmm"],"_cs_type":"threat","_cs_vendors":["F5 Networks"],"content_html":"\u003cp\u003eCVE-2026-41956 is a vulnerability affecting F5 Networks\u0026rsquo; Traffic Management Microkernel (TMM). When a classification profile is configured on a UDP virtual server, specifically crafted requests can trigger a termination of the TMM process. This vulnerability leads to a denial-of-service condition, impacting the availability of services relying on the affected virtual server. The vulnerability is present in undisclosed versions of the software, excluding those that have reached End of Technical Support (EoTS). Exploitation does not require authentication.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a target F5 device with a UDP virtual server configured with a classification profile.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious UDP request specifically designed to trigger the vulnerability.\u003c/li\u003e\n\u003cli\u003eThe attacker sends the crafted UDP request to the vulnerable UDP virtual server.\u003c/li\u003e\n\u003cli\u003eThe F5 device processes the malicious UDP request through the configured classification profile.\u003c/li\u003e\n\u003cli\u003eDue to the vulnerability, the Traffic Management Microkernel (TMM) encounters an unhandled exception.\u003c/li\u003e\n\u003cli\u003eThe TMM process terminates unexpectedly, leading to a denial-of-service condition.\u003c/li\u003e\n\u003cli\u003eServices relying on the affected UDP virtual server become unavailable.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-41956 results in a denial-of-service condition. The termination of the Traffic Management Microkernel (TMM) disrupts traffic processing, causing the affected UDP virtual server and associated services to become unavailable. This can impact critical network functions, leading to service outages and potential financial losses.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor network traffic for anomalous UDP packets targeting F5 devices, using the \u003ccode\u003eDetect Anomalous UDP Traffic Targeting F5 Devices\u003c/code\u003e Sigma rule to identify suspicious activity.\u003c/li\u003e\n\u003cli\u003eApply the security patches or mitigations provided by F5 Networks as soon as they are available to address CVE-2026-41956.\u003c/li\u003e\n\u003cli\u003eDeploy the \u003ccode\u003eDetect TMM Process Termination\u003c/code\u003e Sigma rule to monitor for unexpected TMM process terminations, which may indicate exploitation attempts.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-13T16:30:36Z","date_published":"2026-05-13T16:30:36Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-41956/","summary":"CVE-2026-41956 describes a vulnerability in F5 Networks' Traffic Management Microkernel (TMM) where undisclosed requests can cause TMM termination when a classification profile is configured on a UDP virtual server, leading to a denial-of-service condition.","title":"CVE-2026-41956: F5 TMM Termination Vulnerability on UDP Virtual Servers","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-41956/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-41956","version":"https://jsonfeed.org/version/1.1"}